Map of additional parameter to submit to remote data source.

<div class="definition">
    Object, default = {}
</div>

Adding properties to <span class="property">.postData</span> object will instruct the form to submit these parameters to the remote data source
with each remote request (get, save).
<div style="height: 10px"></div>

You can defined it during object creation:
<textarea class="javascript">
let form = new w2form({
    name     : 'form',
    url      : '/server/url',
    formURL  : '/server/path',
    fields: [
        { field: 'first_name', type: 'text', required: true },
        { field: 'last_name', type: 'text', required: true },
        { field: 'email', type: 'email' }
    ],
    record: {
        first_name : 'John',
        last_name  : 'Doe',
        email      : 'jdoe@email.com'
    },
    actions: {
        "save": function () { this.validate(); },
        "reset": function () { this.clear(); }
    },
    postData: {
        param1 : 'value1',
        param2 : 'value2'
    }
});
</textarea>

Or any time during the run-time.